Keystones — Lintel
Five GCSE retrieval questions · 11 September 2020 · mathsvault.uk/keystones
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1. Number Converting to standard form
7600000
Answer: 7.6 × 106 -
2. Algebra Factorising monic quadratics
Factorise: x² + x - 12
Answer: (x + 4)(x - 3) -
3. Geometry SOHCAHTOA — missing length
Adjacent = 10cm, angle = 56°. Find opposite
Answer: 14.8cm -
4. Ratio Mixed ratio problems
Divide 165 in the ratio 4:4:3
Answer: 60, 60 and 45 -
5. Statistics Mean
The mean of 4 numbers is 31. If 3 of them are 31, 33, 26, what is the missing number?
Answer: 34